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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 379 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.80 + 74 =
  2. 2.42 + 22 =
  3. 3.31 + 57 =
  4. 4.21 + 26 =
  5. 5.23 + 48 =
  6. 6.76 + 41 =
  7. 7.33 + 23 =
  8. 8.83 + 83 =
  9. 9.28 + 21 =
  10. 10.31 + 65 =
  11. 11.65 + 45 =
  12. 12.40 + 16 =
  13. 13.23 + 46 =
  14. 14.80 + 89 =
  15. 15.73 + 21 =
  16. 16.52 + 12 =
  17. 17.59 + 82 =
  18. 18.76 + 46 =
  19. 19.28 + 76 =
  20. 20.25 + 77 =
  21. 21.37 + 72 =
  22. 22.38 + 12 =
  23. 23.33 + 16 =
  24. 24.70 + 59 =
  25. 25.43 + 34 =
  26. 26.59 + 65 =
  27. 27.43 + 19 =
  28. 28.66 + 13 =
  29. 29.81 + 71 =
  30. 30.55 + 43 =
  31. 31.71 + 33 =
  32. 32.43 + 17 =
  33. 33.29 + 36 =
  34. 34.45 + 41 =
  35. 35.53 + 51 =
  36. 36.46 + 12 =
  37. 37.35 + 33 =
  38. 38.75 + 41 =
  39. 39.56 + 41 =
  40. 40.47 + 39 =

Answer key

  1. 154
  2. 64
  3. 88
  4. 47
  5. 71
  6. 117
  7. 56
  8. 166
  9. 49
  10. 96
  11. 110
  12. 56
  13. 69
  14. 169
  15. 94
  16. 64
  17. 141
  18. 122
  19. 104
  20. 102
  21. 109
  22. 50
  23. 49
  24. 129
  25. 77
  26. 124
  27. 62
  28. 79
  29. 152
  30. 98
  31. 104
  32. 60
  33. 65
  34. 86
  35. 104
  36. 58
  37. 68
  38. 116
  39. 97
  40. 86

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